Dictionary <string, Image> _dicSystemFileLaregeIcon = new Dictionary <string, Image>(); //大图标
///<summary>
///根据文件路径获取其系统图标. （支持两种）
///</summary>
KeyValuePair <string, Image> GetImageAndKey(string path, GetSystemIconType iconType)
{
if (iconType == GetSystemIconType.ExtensionSmall)
{
return(GetImageAndKey(path, _dicSystemFileSmallIcon, iconType));
}
else if (iconType == GetSystemIconType.ExtensionLarge)
{
return(GetImageAndKey(path, _dicSystemFileLaregeIcon, iconType));
}
return(new KeyValuePair <string, Image>(null, null));
}
/// <summary>
/// 获取此文件(或扩展名)的系统图标
/// </summary>
public static System.Drawing.Icon GetSystemIcon(string filePath, GetSystemIconType type)
{
System.Drawing.Icon tempIcon = null;
try
{
switch (type)
{
case GetSystemIconType.ExtensionSmall:
if (filePath[0] != '.')
{
tempIcon = GetSmallIcon(System.IO.Path.GetExtension(filePath));
}
else
{
tempIcon = GetSmallIcon(System.IO.Path.GetFullPath(filePath));
}
break;
case GetSystemIconType.ExtensionLarge:
if (filePath[0] != '.')
{
tempIcon = GetLargeIcon(System.IO.Path.GetExtension(filePath));
}
else
{
tempIcon = GetLargeIcon(System.IO.Path.GetFullPath(filePath));
}
break;
case GetSystemIconType.PathSmall:
tempIcon = GetSmallIconForPath(System.IO.Path.GetFullPath(filePath));
break;
case GetSystemIconType.PathLarge:
tempIcon = GetLargeIconForPath(System.IO.Path.GetFullPath(filePath));
break;
default:
throw new ArgumentException("未知的参数:" + type);
}
}
catch
{
#if DEBUG
throw;
#endif
}
return(tempIcon);
}
KeyValuePair <string, Image> GetImageAndKey(string path, Dictionary <string, Image> fileIcon, GetSystemIconType iconType)
{
string extension = Path.GetExtension(path);
//无扩展名时特殊处理
if ((!Utility.File.IsDirectory(path)) && extension == "")
{
string strSign = "?noextension";
if (fileIcon.ContainsKey(strSign))
{
return(new KeyValuePair <string, Image>(strSign, fileIcon[strSign]));
}
else
{
Icon ico = Service.Icon.GetSystemIcon(strSign, iconType);
if (ico != null)
{
Image img = ico.ToBitmap();
fileIcon.Add(strSign, img);
return(new KeyValuePair <string, Image>(strSign, img));
}
else
{
return(new KeyValuePair <string, Image>(null, null));
}
}
}
///如果是文件夹,.exe文件,.lnk文件,则找其具体的图标
else if (Utility.File.IsDirectory(path) || extension == ".exe" || extension == ".lnk")
{
if (iconType == GetSystemIconType.ExtensionLarge)
{
iconType = GetSystemIconType.PathLarge;
}
else if (iconType == GetSystemIconType.ExtensionSmall)
{
iconType = GetSystemIconType.PathSmall;
}
Icon ico = Service.Icon.GetSystemIcon(path, iconType);
if (ico != null)
{
Image img = ico.ToBitmap();
if (!fileIcon.ContainsKey(path))
{
fileIcon.Add(path, img);
}
return(new KeyValuePair <string, Image>(path, img));
}
else
{
return(new KeyValuePair <string, Image>(null, null));
}
}
///其它的找扩展名的图标
else
{
if (fileIcon.ContainsKey(extension))
{
return(new KeyValuePair <string, Image>(extension, fileIcon[extension]));
}
else
{
Icon ico = Service.Icon.GetSystemIcon(extension, iconType);
if (ico != null)
{
Image img = ico.ToBitmap();
fileIcon.Add(extension, img);
return(new KeyValuePair <string, Image>(extension, img));
}
else
{
return(new KeyValuePair <string, Image>(null, null));
}
}
}
}
